CORE AS-RADIATOR 6I4128 - Caterpillar

Hydraulic Universal Quick Coupler with Single Action Cylinder or with Double Action Cylinder (If Equipped)
Inspect the coupler wedge engagement before you operate the excavator.Serious injury or death may result from an improperly engaged coupler.Inspect coupler wedge engagement from the cab by rotating the bucket or the work tool inward. Extend the bucket cylinder to bring the coupler actuator into view and bring the stick in until the wedges are visible.
Note: Before you use the switch to secure the quick coupler, make sure that the quick coupler has either a single action cylinder or a double action cylinder. Verify that the selector valve is adjusted correctly for a single action cylinder or for a double action cylinder.
Illustration 1 g00673876
(A) Switch for the Quick CouplerThe switch for the hydraulic quick coupler is located rearward of the left console.
Illustration 2 g00673900
LOCKED (1) - This position is a neutral position. The wedge is engaged and the work tool is locked. Turn the switch to the LOCKED position before you try to start the process or before you try to restart the process. Turn the switch to the LOCKED position in order to stop the process.
LOCKING (2) - The wedge is retracting and the work tool is moving from theUNLOCKED position to the LOCKED position.
UNLOCKING (3) - The wedge is extending in order to unlock the coupler from the work tool. During this operation, an alarm will sound. Note: Whenever the switch is in LOCKING position (2) or in UNLOCKING position (3), an alarm will sound.
Illustration 3 g00674067
(B) Lunch Box (C) Buzzer for Quick Coupler (D) Harness to Switch for Quick Coupler (E) Overload Warning Device (If Equipped)The buzzer for the quick coupler is located behind the right console inside the lunch box.
Illustration 4 g00674187
(1) Crossmember of the Upper Structure (2) Selector Valve (3) Nut (4) RetainerThe selector valve is located under the crossmember of the upper structure close to the swivel joint. Refer to Illustration 4.
Illustration 5 g00674185
(F) Position of Retainer for a Single Action Cylinder (G) Position of Retainer for a Double Action Cylinder (3) Nut (4) Retainer (5) Single Action Cylinder (6) Double Action CylinderIf the quick coupler is equipped with a single action cylinder, the retainer must be turned clockwise to the maximum position. Refer to Illustration 5 for the proper position of the retainer.If the quick coupler is equipped with a double action cylinder, the retainer must be turned counterclockwise to the maximum position. Refer to Illustration 5 for the proper position of the retainer.